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I'm pretty sure you mean:
"Tell me how to execute a Terminal command" ?
(not the same as writing code - at least, not to me)

I just looked and my external is owned by root, a member of the group admin! (I'm a member of the admin group, too)
So I don't think there's an easy and troublefree way to do that.
Are other potential users admin users? If not, then it's easy.

If you do not know any terminal commands, then maybe you could tell me how to rewrite part of the computer's code in the system. I don't really know what to do. I was thinking that I could maybe rewrite the code so that the computer would not accept anything into the external drives when it is logged out. That would keep him from putting in his disc.

no there are no other user accounts on the computer. I just know a guy that has third party software that would bypass my login screen. I am looking for a way to block him out.

Originally Posted by lherriman

No, he does not have my password. He has a third-party software disc that he puts into the computer that will hack my administrator account and allow him to change the password.

You've got a larger problem here than a simple software issue. As I understand it here, someone is doing something to "hack" your account but to do so, they need access to your machine. The simple answer here is to not let this person use your machine. Second, if they really wanted to access your external HD, they would just take it. I'd suggest that the real issue here is a personal one and not a technical one.

You've got a larger problem here than a simple software issue. As I understand it here, someone is doing something to "hack" your account but to do so, they need access to your machine. The simple answer here is to not let this person use your machine. Second, if they really wanted to access your external HD, they would just take it. I'd suggest that the real issue here is a personal one and not a technical one.

Yes, the person does have access to my computer. I don't have an external HD though. It seems to me like there should be a way to keep him out even if he has access to my computer. If you know of any ways I would really appreciate it.

Could somebody please tell me how to write code into terminal that would cause my mac book pro to not accept anything into the external drives when it is logged out?

If you don't have an external HD, what do you mean by "external drives"?

Originally Posted by lherriman

Yes, the person does have access to my computer. I don't have an external HD though. It seems to me like there should be a way to keep him out even if he has access to my computer. If you know of any ways I would really appreciate it.

It would seem like this person really knows what they're doing assuming they are able to bypass all security measures. Thus (as noted above), the best way to get around this is to simply prevent this person from accessing your machine. You may also want to think of legal action - depending on your jurisdiction, what this person is doing may be against the law (I'm not a lawyer so you'll have to look into this). I'd approach this person first since the legal route should probably be a last resort.

No, I don't have an external HD. Sorry, I meant into the disc drive or any of the usb ports. Yes, they are pretty smart. But it's all in this disc that he has. He doesn't really do much except put the disc into the drive. And it's just a person that I know. He doesn't use the disc on anyone's computer unless they have forgotten the password or something like that. He's never used it on my computer. I just was wondering if there was a way to stop something like that from happening to my computer.

Thanks for providing some clarity. It had sounded as if this person was doing this on a regular basis to you. Who is this person anyway? A friend? IT?

There's nothing we can do if we don't know what software he's using. I also feel the need to repeat what I said earlier - don't let them get access to your machine. You have a MacBook Pro and you can therefore bring it with you. Again, it seems like the larger issue though is trust. Talk to this person if you know them and if not, like I said, prevent them from getting access to your machine.

Technically, there are two kernel extensions that control the operation of your optical drive. I suppose that it's possible to disable them somehow upon logging out (unload them, move them, etc) but doing so would require some technical expertise and risks breaking things.